Skylight



(No Model.)

J. W, GEDDES. Skylight.

No. 232,399. Patented Sept. 21,1880.

UNITED STATES PATENT Orrron.

JAMES IV. GEDDES, OF BALTIMORE, MARYLAND.

SKYLIGHT.

SPECIFICATION forming part of LettersPatent No. 232,399, dated September21, 1880. Application filed March 19, 1880. (No model.)

To all whom it may concern:

Be it known that I, JAMES W. Gnnnns, of Baltimore city, State ofMaryland, have invented certain new and useful Improvements inSkylights; and I hereby declare the same to be fully, clearly, andexactly described as follows, reference being had to the accompanyingdrawings, in which Figure 1 is a top view of a part of a skylightembodying myinvention; Fig.2, a sectional view of the supporting bar orgirder and the sheet-metal frame on line at m, Fig. 1; Fig. 3, a similarview of the junction-bead on same line; Fig. 4, a central sectional viewof a bulls-eye, and Fig. 5 a bottom plan of the lower member of thebulls-eye; Fig. 6, a top plan of a modification of the frame; Fig. 7, asection on line y y, Fig. 6.

My invention has reference to that class of skylights in which a numberof glass bullseyes are secured in a metallic frame; and it consists incertain points of novelty in the bulls-eye, the frame-work, and theconnections of the same, as hereinafter fully set forth.

In the accompanying drawings, A is a sheetmetal frame having suitableapertures for the bulls-eyes. The sections of frame are doubleseamed andbeaded, as shown at a, Fig. 3, the metal being bent downward, as shownat a, whereby provision is made for expansion and contraction, and anopen intervening space is afforded for ventilation, as illustrated. Themetal is similarly double-seamed at I) over the supporting beams orgirders 0, (see Fig. 2,) and a gutter, B, is formed at either side toshed water, and also to afford provision for expansion and contraction.

' The edges of the sheetmetal frame are grooved, as shown at G, toreceive the tubular annular washers h.

The bulls-eye consists of two parts, Gand E. The former is made convexon top, (on the principle of an ordinary periscopio lens,) and has adownwardly-projecting flange,f. It is cast with a thread on itscylindrical surface, and is hollowed beneath, as shown, the conicalsurface being provided with diffraction-beads (1 cl. The other member,E, also of glass, is formed with a female screw-thread, as shown, iscup-shaped in form, and has a polygonal periphery. This latter featuresubserves two widely-different ends. It affords facility for screwingthe members of the bulls-eye together, and also efiects the diffractionor dispersion of the transmitted rays of light. Its base is beaded, asshown at c, for the latter purpose.

A tubular annular washer, h, of india-rubher or equivalent material, islaid inthc groove Gr, and the part (3 being inserted through theaperture in the frame A, the lower member, E, is screwed upon it, awasher, 2', being by preference inserted between it and the frame.

The space F within the bulls-eyes may be filled, or partly filled, withtinted glycerine or chloride-of-calcium solution, or any othernoncongealable liquid, as may be desired.

Little braces or holders Z may be attached to the frame to prevent thepossibility of the part E from unscrewing.

The peculiar construction of the bullscyes secures the maximum ofillumination and effects a proper and uniform diffusion of the light.

Instead of a thread, the parts may have a bayonet-joint or equivalentmeans for connection.

In Fig. 6 is shown a modified form of the device, used forsidewalk-skylights. Here the frame A is cast with a zigzag head, at,high enough to prevent the bulls-eyes from being trod upon, and adaptedto conduct the water to the edge of the skylight. On the under side ofthe frame, below this head, is a hollow perforated bead, n, for purposesof ventilation.

i/Vhat I claim is- 1. In a skylight, a metallic frame-work containingpanes or bulls-eyes and having the seam and expansion-gutter a a, as setforth.

2. In a sheet-metal frame for skylights, and in combination with thebeaded girder c, the seam b and gutters B, as set forth.

3. A skylight bulls-eye consisting of two glass members adapted forconnection, as set forth.

hollow members adapted for connection, as set forth.

5. A skylight bulls eye consisting of two hollow glass members threadedand headed, as set forth.

6. A skylight builseyc having an interior 4. A skylight bulls-eyeconsisting of two IOO space for containing a colored liquid, as set 9.The frame A, having zigzag beads m and forth. n, the latter being hollowand laterally per- 1.0

7. In combination with the frame and twoforated, as set forth. partbulls-eye, the catch], as set forth. Witness my hand this 17th of March,1880.

8. In combination with the flanged member JAMES W. GEDDES.

G, the polygonal member E, adapted for at- Witnesses:

taohment to the same, as and for the purpose R. D. WILLIAMS,

set forth. OHARLEs A. VAILE.

